Rolls-Royce Archives
From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
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DescriptionDateIdentifier
Arranging the examination and testing of a sleeveless magneto produced by Messrs. Norths for the 40/50 HP engine.11th Mar 1926Box 40 \ 2  Scan158
Letter from an accumulator manufacturer regarding Mr. Royce's feedback on a car's performance, battery, and other components.29th Nov 1926Box 40 \ 2  Scan159
Table detailing the force required to move the cam lever on various magnetos.13th Dec 1926Box 40 \ 2  Scan160
Magneto specifications and supplier issues, comparing Watford and Lucas products for 40/50 and 20HP models.27th Jan 1927Box 40 \ 2  Scan161
With sketches discussing ignition component design, comparing different manufacturers and materials.28th Jan 1927Box 40 \ 2  Scan162
Sending two Lucas magnetos for trial as an alternative to the standard Watford magnetos for the Phantom chassis.31th Jan 1927Box 40 \ 2  Scan163
The lifespan of magneto platinum contact points from suppliers Watford and Lucas.11th Feb 1927Box 40 \ 2  Scan164
Comparing the lifespan and performance of different types of magneto and battery ignition contact points.16th Feb 1927Box 40 \ 2  Scan165
Inquiring about performance observations of two Lucas magnetos on a chassis.9th Mar 1927Box 40 \ 2  Scan166
Request from the Lucas Company to borrow an ERS magneto.10th Mar 1927Box 40 \ 2  Scan167
Reply concerning the testing of Lucas Magnetos X8795.10th Mar 1927Box 40 \ 2  Scan168
Authorizing the loan of an ER6 magneto to Joseph Lucas Ltd.10th Mar 1927Box 40 \ 2  Scan169
Letter to Joseph Lucas Ltd. regarding the return of a Magneto.12th Mar 1927Box 40 \ 2  Scan170
Test report on a Lucas Magneto detailing its performance, silence and interchangeability issues with a Watford Magneto.22th Mar 1927Box 40 \ 2  Scan171
Confidential memo discussing issues and costs related to Lucas and Watford magnetos.1st Apr 1927Box 40 \ 2  Scan172
Confidential letter from Joseph Lucas Limited concerning magneto returns under guarantee.29th Mar 1927Box 40 \ 2  Scan173
Letter from Joseph Lucas Ltd regarding product reliability, contact breaker points, and distributor brush issues.29th Mar 1927Box 40 \ 2  Scan174
Copy of a letter from Joseph Lucas Ltd offering to supply further details on a matter.29th Mar 1927Box 40 \ 2  Scan175
Letter to The Lucas Elec. Co. Ltd. requesting the return of a borrowed type ER6 magneto.6th Apr 1927Box 40 \ 2  Scan176
Letter from Joseph Lucas Limited confirming a telephone conversation and arranging to send a sample E.R.6 magneto.8th Apr 1927Box 40 \ 2  Scan177
Poor reputation of the Lucas magneto and advising against its adoption until its reliability is proven on other vehicles.12th Apr 1927Box 40 \ 2  Scan178
Superior performance of Lucas magneto contact points and proposing an experiment to test them.25th Apr 1927Box 40 \ 2  Scan179
Letter to Lucas Electrical Co. Ltd. about a returned ERS magneto and a request for clarification on its replacement.25th Apr 1927Box 40 \ 2  Scan180
Return and replacement of a Lucas type ERS Magneto.27th Apr 1927Box 40 \ 2  Scan181
Letter from Joseph Lucas Limited regarding the return and modification of an E.R.6. Magneto.2nd May 1927Box 40 \ 2  Scan182
Forwarding a copy of a letter from Joseph Lucas Ltd. concerning their contact points.2nd May 1927Box 40 \ 2  Scan183
Letter from Joseph Lucas Ltd. responding to a request for special contact breaker points and offering to investigate the entire ignition system.30th Apr 1927Box 40 \ 2  Scan184
Letter to Joseph Lucas Ltd. regarding an experiment to fit their contact breaker points to a battery ignition system.26th Apr 1927Box 40 \ 2  Scan185
From EFC to Wd. discussing a proposal to experimentally test Lucas contact points on their ignition apparatus.3rd May 1927Box 40 \ 2  Scan186
The supply of ignition sets to Messrs. Lucas for their contact points.3rd May 1927Box 40 \ 2  Scan187
Decision not to pursue a matter with Joseph Lucas Ltd.4th May 1927Box 40 \ 2  Scan188
The performance and issues with a Lucas Magneto and other components on car 7-EX after 10,000 miles.11th May 1927Box 40 \ 2  Scan189
Inspecting a Bosch ignition coil and returning a Lucas magneto.17th May 1927Box 40 \ 2  Scan190
Modifications made to a Lucas EF6 Magneto and outlining future comparative tests.19th May 1927Box 40 \ 2  Scan191
Instruction sheet detailing modifications to the Lucas ER6 magneto No 53.19th May 1927Box 40 \ 2  Scan192
Instructions regarding modifications and comparative testing of Lucas and Watford magnetos.1st Jun 1927Box 40 \ 2  Scan193
Form recording the details and performance of a magneto test.1st Jun 1927Box 40 \ 2  Scan194
Specifications for primary point gap, contact breaker timing, and automatic advance characteristics.1st Jun 1927Box 40 \ 2  Scan195
Specification sheet detailing distributor dimensions in relative and absolute units, with a handwritten explanatory note.1st Jun 1927Box 40 \ 2  Scan196
Results of endurance and open circuit tests, including a volt-speed curve.1st Jun 1927Box 40 \ 2  Scan197
Test results for an electrical component, detailing ampere-speed curves and sparking characteristics.1st Jun 1927Box 40 \ 2  Scan198
Test report detailing secondary milliamps, primary point gap measurements, and contact breaker timing results.7th Oct 1938Box 40 \ 2  Scan199
Notes on operational silence and the tangential force required to advance a cam lever.7th Oct 1938Box 40 \ 2  Scan200
Requesting a comparative test of a sleeveless Watford magneto and a Lucas type ER6 magneto.10th Jun 1927Box 40 \ 2  Scan201
The inspection and testing of a new sleeveless Watford magneto and an up-to-date Lucas ER6 magneto.11th Jun 1927Box 40 \ 2  Scan202
Preliminary examination of a Lucas type ERS magneto, detailing modifications and specifications.13th Jun 1927Box 40 \ 2  Scan203
Comparison of specifications for Watford and Lucas magnetos, including ranges, timing, and distributor dimensions.13th Jun 1927Box 40 \ 2  Scan204
Comparison table of relative distributor dimensions for different ignition systems.13th Jun 1927Box 40 \ 2  Scan205
Endurance, short circuit, and open circuit tests performed on two magnetos.13th Jun 1927Box 40 \ 2  Scan206
Test report comparing the performance of two different machines, Lucas and Watford, including utility and speed tests.13th Jun 1927Box 40 \ 2  Scan207
Magneto performance, comparing the highest and lowest firing speeds of Watford and Lucas models under various test conditions.13th Jun 1927Box 40 \ 2  Scan208
Performance comparison between Watford and Lucas magnetos, detailing speeds, current draw, and noise levels.13th Jun 1927Box 40 \ 2  Scan209
Comparison report on the performance of Watford sleeveless type and Lucas type E.H6 magnetos.13th Jun 1927Box 40 \ 2  Scan210
Continued comparative analysis of Lucas and Watford magnetos regarding sparking figures.14th Jun 1937Box 40 \ 2  Scan211
Graph showing the open circuit volt-speed and short circuit ampere-speed curves for Watford and Lucas magnetos.14th Jun 1937Box 40 \ 2  Scan212
The dispatch of a Bosch ignition head and Lucas magneto, and requesting new models from Lucas and Watford.18th Jun 1927Box 40 \ 2  Scan213
The upgrading of two Lucas magnetos to match a third, ensuring interchangeability of distributors.24th Jun 1927Box 40 \ 2  Scan214
The testing results of a Lucas Magneto Type ER6, noting its performance and noise levels.27th Jun 1927Box 40 \ 2  Scan215
History of two Lucas magnetos.28th Jun 1927Box 40 \ 2  Scan216
History and performance report on Lucas ER6 Magnetos, models 51 and 54B.28th Jun 1927Box 40 \ 2  Scan217
The testing of a Lucas magneto 54B, detailing its performance and interchangeability with a Watford magneto.22th Mar 1927Box 40 \ 2  Scan218
Availability of the latest Lucas and new sleeveless Watford magnetos.29th Jun 1927Box 40 \ 2  Scan219
Instruction to replace the standard Watford magneto with an up-to-date Lucas magneto on chassis 9-EX.16th Jul 1927Box 40 \ 2  Scan220
Cured possibility of armature failures in magnetos and their low reject rate.13th Jul 1927Box 40 \ 2  Scan221
Swapping of a Lucas magneto with a Watford magneto between cars 9-EX and 10-EX due to noise levels.9th Aug 1927Box 40 \ 2  Scan222
Inquiring about the status of two Lucas magnetos returned for upgrading.23th Aug 1927Box 40 \ 2  Scan223
Testing of a new sleeveless magneto and swapping existing magnetos between chassis to resolve a noise issue.23th Aug 1927Box 40 \ 2  Scan224
Refusal to use Lucas magnetos due to their poor reputation and a comparison with other suppliers.27th Aug 1927Box 40 \ 2  Scan225
Damaged Lucas magneto distributor and a proposal for a safer screw-on design.13th Sep 1927Box 40 \ 2  Scan226
Letter from Joseph Lucas Ltd regarding a delay in modifying two magnetos due to difficulties meeting performance specifications.12th Oct 1927Box 40 \ 2  Scan227
Letter to Messrs. Lucas Ltd. concerning experiments on ERS magnetos and a reduction in their utility value.13th Oct 1927Box 40 \ 2  Scan228
Letter from Joseph Lucas Limited regarding experiments and the despatch of two ER6 magnetos.14th Oct 1927Box 40 \ 2  Scan229
Letter to The Lucas Elect. Co. Ltd. regarding a revised specification of performance for a 6-cylinder magneto.27th Oct 1927Box 40 \ 2  Scan230
The delayed receipt of two Lucas magnetos sent for an update.13th Dec 1927Box 40 \ 2  Scan231
Letter from Joseph Lucas Ltd regarding test results for type ER6 magnetos.5th Jan 1928Box 40 \ 2  Scan232
Test specification and performance data for Lucas ER6 magnetos.5th Jan 1928Box 40 \ 2  Scan233
The examination and testing of Lucas Type ER6 chassis magnetos.24th Jan 1928Box 40 \ 2  Scan234
Test report on a Lucas ER6 magneto after a 14,000-mile run, comparing low-speed sparking performance.21th Jan 1928Box 40 \ 2  Scan235
Instruction sheet detailing the examination of a magneto's electrical and mechanical condition.8th Dec 1924Box 40 \ 2  Scan236
Instructions regarding the cleaning of one magneto and the comparative testing of a Watford EW6 magneto.8th Dec 1924Box 40 \ 2  Scan237
Sending a Lucas magneto with a jump spark distributor for testing.11th Feb 1928Box 40 \ 2  Scan238
The investigation into the noisiness of Watford EW6 magnetos using modified cams.11th Feb 1928Box 40 \ 2  Scan239
The testing of magnetos, focusing on noise issues and their causes.13th Dec 1927Box 40 \ 2  Scan240
Noise testing of various magnetos and a modified contact breaker lever.11th Feb 1928Box 40 \ 2  Scan241
Magneto noise and operating force issues, suggesting design modifications and referencing various suppliers and models.11th Feb 1928Box 40 \ 2  Scan242
The design and performance variations of six magnetos, focusing on distributor rotor location and internal timing.11th Feb 1928Box 40 \ 2  Scan243
The performance and durability testing of Lucas magnetos, comparing tungsten and platinum contact points.24th Jan 1928Box 40 \ 2  Scan244
Test report on a Lucas Magneto ER.6 type B54B which developed a knock and was returned.15th Feb 1928Box 40 \ 2  Scan245
Exchanging a noisy Watford magneto for a Lucas magneto between experimental vehicles.6th Mar 1928Box 40 \ 2  Scan246
The investigation of a knocking noise in a modernised Lucas ER6 magneto.30th Mar 1928Box 40 \ 2  Scan247
Noisy magneto caused by a slightly warped bakelite gear wheel.9th Dec 1924Box 40 \ 2  Scan248
The unsatisfactory performance of Watford EW.6 magnetos, particularly regarding noisiness and poor low-speed electrical output.11th Apr 1928Box 40 \ 2  Scan249
Magneto performance issues, including cold start failures and noise, leading to specification changes and further testing.11th Apr 1928Box 40 \ 2  Scan250
Endurance tests and noise issues with magnetos, mentioning specific part numbers and modifications.11th Apr 1928Box 40 \ 2  Scan251
Endurance tests of magneto components, including tungsten points and bakelite gears.11th Apr 1928Box 40 \ 2  Scan252
Suggestion to obtain Lucas machines for production testing rather than experimental testing.16th Apr 1928Box 40 \ 2  Scan253
Selection of magnetos, comparing Watford, Lucas, and German Bosch models.16th Apr 1928Box 40 \ 2  Scan254
Extract from a letter regarding the performance of a Lucas magneto after 22,000 miles.15th May 1928Box 40 \ 2  Scan255
Examination and test report for a Lucas EFS Magneto No.55 from a Phantom chassis.12th Jun 1928Box 40 \ 2  Scan256
The examination, testing, and return of a Lucas magneto from a customer's car.13th Jun 1928Box 40 \ 2  Scan257


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